1D mono frequency ratio log extraction workflow procedure from seismic attribute depth volume

A non-transitory computer readable medium storing instructions executable by a computer processor, the instructions comprising functionality for:

• receiving a time domain seismic image;
• receiving a seismic velocity model;
• determining a first mono-spectral seismic image and a second mono-spectral seismic image from the time domain seismic image;
• determining a time domain spectral ratio image based, at least in part, on the first mono-spectral seismic image and the second mono-spectral seismic image;
• transforming the spectral ratio image from the time domain to the depth domain based, at least in part, on the seismic velocity model;
• determining a wellbore path through the depth domain spectral ratio image;
• and
• extracting a spectral ratio log along the wellbore path from the depth domain spectral ratio image.

A system, comprising:

• a seismic acquisition system;
• and
• a seismic processor configured to:
• receive a seismic dataset;
• receive a seismic velocity model;
• generate a time domain seismic image from the seismic dataset;
• determine a first mono-spectral seismic image and a second mono-spectral seismic image from the seismic image;
• determine a spectral ratio image based, at least in part, on the first mono-spectral seismic image and the second mono-spectral seismic image;
• transform the spectral ratio image from the time domain to the depth domain based, at least in part, on the seismic velocity model;
• determine a wellbore path through the depth domain spectral ratio image;
• and
• extract a spectral ratio log along the wellbore path from the depth domain spectral ratio image.